ASTROSAT CZTI

Data Quality Report

Orbit 20171215_A04_082T01_9000001772_level2

Creation date: 2025-11-19T03:20:25.738639
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A04_082T01_9000001772cztM0_level2.fits modeM0/AS1A04_082T01_9000001772cztM0_level2_quad_clean.evt
Size (bytes)1,128,110,4001,214,864,640
Size1.1 GB 1.1 GB
Events in quadrant A6,800,8007,554,520
Events in quadrant B6,505,0667,223,354
Events in quadrant C6,735,8767,138,557
Events in quadrant D5,649,1846,409,445

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025160
B025160
C025160
D025160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02690810
B03137050
C02546730
D03268250

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01760
B01760
C01760
D01760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12358620791.682229%
B12358667455.457738%
C12358611490.929717%
D12358667905.494150%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 140621 123563 0 0 0.00% 0.00%
B 140621 123528 0 0 0.00% 0.00%
C 140621 123570 0 0 0.00% 0.00%
D 140621 123479 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 29 6689 11.22 1772 1649 449.1
A 7 110 5715 9.05 1772 1649 449.1
A 0 30 5220 7.95 1772 1649 449.1
B 2 9 5760 12.18 1714 1634 338.8
B 2 8 4261 7.75 1714 1634 338.8
B 3 17 4248 7.72 1714 1634 338.8
C 12 241 4908 7.0 1780 1647 466.0
C 2 191 4540 6.21 1780 1647 466.0
C 3 126 4422 5.95 1780 1647 466.0
D 3 14 4282 6.62 1611 1463 425.5
D 6 231 4119 6.24 1611 1463 425.5
D 6 67 4019 6.01 1611 1463 425.5

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter